|BBC Research and Development Report Number 1984-14|
R&D Report 1984-14 : Electronic generation of text for television. N.E. Tanton The image quality of present-day television character generators is compared with the quality of text images derived by scanning real network. To illustrate and identify the causes of image distortion (aliasing) prevalent in these and other synthetic television images, the spectral consequences of scanning a scene and of representing any image with a two-level (1-bit) signal are discussed...
Keywords: image; filter; frequency; vertical; filtering; character; scanned; signal; spatial; electronic; scanned artwork; characters filtered; impulse response; electronic character; image quality; character generators; frequency components; spatial frequency; frequency characteristic; aliasing distortions
|BBC Research and Development Report Number 1984-06|
R&D Report 1984-06 : The present status of Clean PAL systems. J.O.Drewery The various approaches to realising a Clean PAL system, in which luminance and chrominance interact minimally, are reviewed. Attention is focussed on the Weston Clean PAL system which offers the possibility of simultaneous luminance and chrominance transmission retaining the optimum spectral distribution for each. Starting with the original proposal, based on single line delay filters, it is shown how the system can be ref...
Keywords: pal; luminance; chrominance; filtering; weston; system; vertical; clean; spectral; bbc; yuv signals; vertical filtering; clean pal; pal systems; weston clean; luminance aliasing; system offered; department report; pal system; vertical bandwidth
|BBC Research and Development Report Number 1982-07|
R&D Report 1982-07 : Colour separation overlay and its relation to digital video sampling. A. Oliphant Current techniques for Colour Separation Overlay (CSO) are briefly described. The influence of CSO techniques on the formulation of standards for digital video sampling parameters is discussed and experiments are described which investigated the effects on CSO pictures of filtering and sampling the foreground picture signals...
Keywords: cso; sampling; chrominance; digital; aliasing; luminance; frequency; foreground; signal; mhz; compound picture; chrominance sampling; sampling frequency; separation overlay; digital video; key signal; luminance sampling; video sampling; colour separation; blue background
|dec :: tech reports :: SRC-RR-156|
From the bitsavers.org collection, a scanned-in computer-related document.dec :: tech reports :: SRC-RR-156
Keywords: pivot; abstract; captures; rep; field; lexer; methodology; dependencies; program; abstraction; pivot field; rep exposure; abstract aliasing; abstract data; mutable components; pivot fields; data type; rdr field; input program; extended static
|mit :: lcs :: tr :: MIT-LCS-TR-247|
From the bitsavers.org collection, a scanned-in computer-related document.mit :: lcs :: tr :: MIT-LCS-TR-247
Keywords: procedure; variables; alias; parameters; algorithm; aliasing; variable; values; formal; affect; control flow; procedure variables; data flow; formal parameters; transitive closure; actual parameters; procedure variable; storage accessible; label variables; formal parameter
|6.450 Principles of Digital Communications I, Fall 2006 - MIT OpenCourseWare|
The course serves as an introduction to the theory and practice behind many of today's communications systems. 6.450 forms the first of a two-course sequence on digital communication. The second class, 6.451, is offered in the spring. Topics covered include: digital communications at the block diagram level, data compression, Lempel-Ziv algorithm, scalar and vector quantization, sampling and aliasing, the Nyquist criterion, PAM and QAM modulation, signal constellations, finite-energy waveform sp...
Keywords: digital communication, data compression, Lempel-Ziv algorithm, scalar quantization, vector quantization, sampling, aliasing, Nyquist criterion, PAM modulation, QAM modulation, signal constellations, finite-energy waveform spaces, detection, communication system design
|MIT 6.450 Principles of Digital Communications I (revised), Fall 2006 - MIT OpenCourseWare|
*This version has overhead slides that have had been adjusted for better readability. The course serves as an introduction to the theory and practice behind many of today's communications systems. 6.450 forms the first of a two-course sequence on digital communication. The second class, 6.451, is offered in the spring. Topics covered include: digital communications at the block diagram level, data compression, Lempel-Ziv algorithm, scalar and vector quantization, sampling and aliasing, the Nyqui...
Keywords: digital communication; data compression; Lempel-Ziv algorithm; scalar quantization; vector quantization; sampling; aliasing; Nyquist criterion; PAM modulation; QAM modulation; signal constellations; finite-energy waveform spaces; detection; communication system design